Question

I have the following table structure:

id  product_id  attribute_id    attribute_val_id

138     18          29          304
137     17          29          304
78      17          20          161
79      17          21          301
80      17          22          94

I want to select product Id (for example 17) which has attribute_val_id equal to: 304 and 161 and 301.

I’ve tried:

SELECT DISTINCT product_id FROM `products_attribute_rel` 
WHERE attribute_val_id = 304 
AND attribute_val_id = 161 
AND attribute_val_id = 301

But with this I get empty results. MYSQL IN sentence also makes no good.

Any ideas ?

Answer 1

SELECT product_id
FROM products_attribute_rel 
WHERE attribute_val_id IN (161, 301, 304)
GROUP BY product_id
HAVING COUNT(DISTINCT attribute_val_id) >= 3;

You should have (attribute_val_id, product_id) index on the table to make the query faster.